Tools

Pet project: The San Francisco SPCA hosts a bash to celebrate the reopening of its adoption center. Guests can see the remodeled facility, adopt a pet and party. [4 to 10 p.m., 201 Alabama St., S.F.; RSVP required; details at www.sfspca.org]

SATURDAY

A great hike

Redwoods Ramble: Don’t you just love that new parking lot smell?! OK, maybe it’s the smell of the ferns and redwoods at El Corte de Madera Creek Open Space Preserve, but we’ll still say bravo to Midpeninsula Regional Open Space District for the new staging area and trail connection, marking the starting point for a 3-mile (round-trip) partial-loop hike featuring dramatic canyons bordered by redwoods. It connects the Sierra Morena Trail, Gordon Mill Trail and the Steam Donkey trail. [Visit WeekendSherpa.com to find out more about getting outdoors in Northern California.]

Ferry Plaza Farmers Market top picks

Figs

Baby lettuce

Basil

Boysenberries

Cilantro

Daikon radishes

Padrón peppers

Peas

Red Cloud apricot conserve

— www.cuesa.org

Fairs and festivals

Juneteenth: Juneteenth events, celebrating African-American heritage, take place this weekend. Saturday’s slate includes a festival and parade in the Fillmore neighborhood.
[11 a.m. to 6 p.m., Fillmore Street, between Sutter and Turk streets, S.F.]

North Beach: The 2014 North Beach Festival, celebrating the neighborhood known for its Italian and Beat cultures, begins. Festivities include crafts, food and street painting. [10 a.m. to 6 p.m., Columbus and Grant avenues and thereabouts, S.F.]

Off the Grid: Food-truck foodies will enjoy biking to lunch at Off the Grid at the Presidio. Get there by taking a leisurely weekend ride along the Embarcadero, then lounge and eat at the Presidio Main Post Lawn. The free event happens every Sunday and includes — in addition to your favorite gourmet food trucks — drink stands, music, games and a fantastic view of the bay. [11 a.m. to 4 p.m., Presidio Main Post Lawn, Lincoln Boulevard between Anza Street and Montgomery Ave, S.F,; www.offthegridsf.com.]

County fair: The 2014 San Mateo County Fair ends Sunday. The event features rides, exhibits, entertainment and food vendors. [11 a.m. to 10 p.m., San Mateo County Event Center, 1346 Saratoga Drive, San Mateo]

Aquatic life: Dads and granddads receive free admission to Aquarium of the Bay on Father’s Day. Attractions include special programs about the “dads of the bay.” [9 a.m. to 8 p.m., Beach Street and the Embarcadero, S.F.]